Pop-on mounting of the horn to the base- Weather-resistant for both outdoor and indoor paging applications- ABS with ultra-violet inhibitors and stainless-steel hardware- Shatter-resistant mounting base- Mounts to eight of the most popular electrical boxes- Nine position selector switch- Operates on 25, 70, and 100 Volt Speaker Lines- Specifications: 15 Watt, 25/70/100 Volt Transformer- Taps: 15, 7.5, 3.8, 1.8, 0.9 Watts- Available Colors: Beige, Gray, and White- Available in Marine Version